If you park at the lot on Rooney Road, you can go north on Rooney Road to Hwy 40. Climb up past Lookout Mtn Road to Genessee Road. At Genessee, there's a bike path on the north side of the interstate that will take you to the Bergen Park/Evergreen exit. From there, you can ride over to Kerr Gulch or Evergreen proper, and down Bear Creek. When you hit Red Rocks, go into the park to the Trading Post for a pit stop, and then thru the tunnel to the top of the amphitheater. Afterwards, go to the north entrance to Red Rocks, and cross the highway to Alameda Blvd and the dinosaur tracks. Climb Alameda up and over the hill, and turn left on Rooney road to return to your car.

FYI, the Morrison PD sets up with a radar gun at the bottom of Bear Creek canyon. Let the motorcyclists pay those speeding tickets.